From af8fcdde8854985287c7b9580a77543275bbd70c Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@gmail.com>
Date: Mon, 14 Feb 2022 11:24:52 -0500
Subject: [PATCH] add checks

---
 src/lib.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 0f54f54..85504d8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -173,6 +173,18 @@ impl ChartManager {
             | (min_y != self.min_y)
             | (max_y != self.max_y);
 
+        if min_x >= max_x {
+            panic!("min_x is greater than (or equal to) than max_x!");
+        }
+
+        if min_y >= max_y {
+            panic!("min_y is greater than (or equal to) than max_y!");
+        }
+
+        if 0 > resolution {
+            panic!("resolution cannot be less than 0");
+        }
+
         self.use_back_cache =
             !underlying_update && self.resolution == resolution && self.back_cache.is_some();
         self.use_front_cache = match underlying_update {